docs: def transform_external(self, external_url):
          """
          Turns an external URL into a Filestack Transform object
  
          *returns* [Filestack.Transform]
  
          ```python
          from filestack import Client, Filelink
  
          client = Client("API_KEY")
          transform = client.transform_external('http://www.example.com')
          ```
          """
          return filestack.models.Transform(apikey=self.apikey, security=self.security, external_url=external_url)